TY - JOUR
T1 - Interfacial Tm3+ moment-driven anomalous Hall effect in Pt/Tm3Fe5O12 heterostructure
AU - Liu, Yu Kuai
AU - Wong, Hon Fai
AU - Ng, Sheung Mei
AU - Mak, Chee Leung
AU - Leung, Chi Wah
PY - 2020/5/1
Y1 - 2020/5/1
N2 - We performed anomalous Hall effect (AHE) measurements in Pt/Tm3Fe5O12 (Pt/TmIG) bilayers grown on (1 1 0) and (1 1 1)-oriented Gd3Ga5O12 (GGG) substrates (Pt/110TmIG and Pt/111TmIG). Qualitative differences were observed in the two sets of samples: at low magnetic fields only Pt/111TmIG displays square AHE loop, while Pt/110TmIG exhibits non-hysteretic AHE behavior. Systematic temperature-dependent AHE measurements in Pt/111TmIG showed double switching events of AHE loops below 30 K, which was attributed to the larger moment of Tm3+ sublattice at low temperatures and was consistent with earlier theoretical calculations [A. Lehmann-Szweykowska et al., Phys. Rev. B 37, 459 (1988)]. Our results confirmed the strong coupling of Tm3+ magnetic moment with the lattice and the crucial role of the interfacial structure, suggesting a way to detect rare earth moment switching in iron garnets by electrical measurements.
AB - We performed anomalous Hall effect (AHE) measurements in Pt/Tm3Fe5O12 (Pt/TmIG) bilayers grown on (1 1 0) and (1 1 1)-oriented Gd3Ga5O12 (GGG) substrates (Pt/110TmIG and Pt/111TmIG). Qualitative differences were observed in the two sets of samples: at low magnetic fields only Pt/111TmIG displays square AHE loop, while Pt/110TmIG exhibits non-hysteretic AHE behavior. Systematic temperature-dependent AHE measurements in Pt/111TmIG showed double switching events of AHE loops below 30 K, which was attributed to the larger moment of Tm3+ sublattice at low temperatures and was consistent with earlier theoretical calculations [A. Lehmann-Szweykowska et al., Phys. Rev. B 37, 459 (1988)]. Our results confirmed the strong coupling of Tm3+ magnetic moment with the lattice and the crucial role of the interfacial structure, suggesting a way to detect rare earth moment switching in iron garnets by electrical measurements.
UR - http://www.scopus.com/inward/record.url?scp=85078213626&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2020.166454
DO - 10.1016/j.jmmm.2020.166454
M3 - Journal article
AN - SCOPUS:85078213626
VL - 501
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
M1 - 166454
ER -